Ok, I've followed the online video tutorial steps 1 to 3 and these images show some of those steps...
These are the front and side profiles of the photo's I'll be using as a reference for my 3D face model. They've been adjusted in Photoshop to conpensate for lens distortion etc using the Lens Correction function. And for any ditortion from the camera being at a slightly different height using the Horizontal and Vertical Perspective functions.
I alligned my eyes on the front view using the Straightening tool.
Once the side view was placed alongside the front, I used the Ruler tool to ensure both views were correctly alligned.
Then I've added blue lines to indicate features like cheek bones and folds in the skin.
The red lines were then added to represent the topology of the face and will serve as location indicators for the individual facets of the 3D model.
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